Wiktionary
disulfoton
n. A highly toxic organothiophosphate insecticide and acaricide, ''O,O-diethyl S-2-ethylthioethyl phosphorodithioate''
Wikipedia
Disulfoton
Disulfoton is an organophosphate acetylcholinesterase inhibitor used as an insecticide. It is manufactured under the name Di-Syston by Bayer CropScience.
The use of the substance has been restricted by the US government. Bayer, the manufacturer, exited the US market December 31, 2009.